1230072439 has 4 divisors (see below), whose sum is σ = 1272488760. Its totient is φ = 1187656120.

The previous prime is 1230072433. The next prime is 1230072509. The reversal of 1230072439 is 9342700321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9342700321 = 2647 ⋅3529543.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230072439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230072439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230072433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21208117 + ... + 21208174.

It is an arithmetic number, because the mean of its divisors is an integer number (318122190).

Almost surely, 2^1230072439 is an apocalyptic number.

1230072439 is a deficient number, since it is larger than the sum of its proper divisors (42416321).

1230072439 is an equidigital number, since it uses as much as digits as its factorization.

1230072439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42416320.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 1230072439 is about 35072.3885556715. The cubic root of 1230072439 is about 1071.4623029186.

The spelling of 1230072439 in words is "one billion, two hundred thirty million, seventy-two thousand, four hundred thirty-nine".